clocksource/drivers/mips-gic-timer: Convert init function to return error
The init functions do not return any error. They behave as the following:
- panic, thus leading to a kernel crash while another timer may work and
make the system boot up correctly
or
- print an error and let the caller unaware if the state of the system
Change that by converting the init functions to return an error conforming
to the CLOCKSOURCE_OF_RET prototype.
Proper error handling (rollback, errno value) will be changed later case
by case, thus this change just return back an error or success in the init
function.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/drivers/clocksource/mips-gic-timer.c b/drivers/clocksource/mips-gic-timer.c
index 89d3e4d..b164b87 100644
--- a/drivers/clocksource/mips-gic-timer.c
+++ b/drivers/clocksource/mips-gic-timer.c
@@ -146,7 +146,7 @@
.archdata = { .vdso_clock_mode = VDSO_CLOCK_GIC },
};
-static void __init __gic_clocksource_init(void)
+static int __init __gic_clocksource_init(void)
{
int ret;
@@ -159,6 +159,8 @@
ret = clocksource_register_hz(&gic_clocksource, gic_frequency);
if (ret < 0)
pr_warn("GIC: Unable to register clocksource\n");
+
+ return ret;
}
void __init gic_clocksource_init(unsigned int frequency)
@@ -179,31 +181,35 @@
struct clk *clk;
int ret;
- if (WARN_ON(!gic_present || !node->parent ||
- !of_device_is_compatible(node->parent, "mti,gic")))
- return;
+ if (!gic_present || !node->parent ||
+ !of_device_is_compatible(node->parent, "mti,gic")) {
+ pr_warn("No DT definition for the mips gic driver");
+ return -ENXIO;
+ }
clk = of_clk_get(node, 0);
if (!IS_ERR(clk)) {
if (clk_prepare_enable(clk) < 0) {
pr_err("GIC failed to enable clock\n");
clk_put(clk);
- return;
+ return PTR_ERR(clk);
}
gic_frequency = clk_get_rate(clk);
} else if (of_property_read_u32(node, "clock-frequency",
&gic_frequency)) {
pr_err("GIC frequency not specified.\n");
- return;
+ return -EINVAL;;
}
gic_timer_irq = irq_of_parse_and_map(node, 0);
if (!gic_timer_irq) {
pr_err("GIC timer IRQ not specified.\n");
- return;
+ return -EINVAL;;
}
- __gic_clocksource_init();
+ ret = __gic_clocksource_init();
+ if (ret)
+ return ret;
ret = gic_clockevent_init();
if (!ret && !IS_ERR(clk)) {
@@ -213,6 +219,8 @@
/* And finally start the counter */
gic_start_count();
+
+ return 0;
}
-CLOCKSOURCE_OF_DECLARE(mips_gic_timer, "mti,gic-timer",
+CLOCKSOURCE_OF_DECLARE_RET(mips_gic_timer, "mti,gic-timer",
gic_clocksource_of_init);